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A-mass-of-12kg-rests-on-a-smooth-inclined-plane-which-is-6m-long-and-1m-high-The-mass-is-connected-by-a-light-inextensible-string-which-passes-over-a-smooth-pulley-fixed-at-the-top-of-the-plane-to-a-




Question Number 194563 by pete last updated on 10/Jul/23
A mass of 12kg rests on a smooth inclined  plane which is 6m long and 1m high.  The mass is connected by a light inextensible  string which passes over a smooth pulley  fixed at the top of the plane to a mass of  4kg which is hanging freely. With the  string taut, the system is released from rest.  Using Polya problem solving approach  find the following:  a. acceleration of the system  b i. velocity with which the 4kg mass hits  the ground.  b ii. time the 4kg mass takes to hit the ground
$$\mathrm{A}\:\mathrm{mass}\:\mathrm{of}\:\mathrm{12kg}\:\mathrm{rests}\:\mathrm{on}\:\mathrm{a}\:\mathrm{smooth}\:\mathrm{inclined} \\ $$$$\mathrm{plane}\:\mathrm{which}\:\mathrm{is}\:\mathrm{6m}\:\mathrm{long}\:\mathrm{and}\:\mathrm{1m}\:\mathrm{high}. \\ $$$$\mathrm{The}\:\mathrm{mass}\:\mathrm{is}\:\mathrm{connected}\:\mathrm{by}\:\mathrm{a}\:\mathrm{light}\:\mathrm{inextensible} \\ $$$$\mathrm{string}\:\mathrm{which}\:\mathrm{passes}\:\mathrm{over}\:\mathrm{a}\:\mathrm{smooth}\:\mathrm{pulley} \\ $$$$\mathrm{fixed}\:\mathrm{at}\:\mathrm{the}\:\mathrm{top}\:\mathrm{of}\:\mathrm{the}\:\mathrm{plane}\:\mathrm{to}\:\mathrm{a}\:\mathrm{mass}\:\mathrm{of} \\ $$$$\mathrm{4kg}\:\mathrm{which}\:\mathrm{is}\:\mathrm{hanging}\:\mathrm{freely}.\:\mathrm{With}\:\mathrm{the} \\ $$$$\mathrm{string}\:\mathrm{taut},\:\mathrm{the}\:\mathrm{system}\:\mathrm{is}\:\mathrm{released}\:\mathrm{from}\:\mathrm{rest}. \\ $$$$\mathrm{Using}\:\mathrm{Polya}\:\mathrm{problem}\:\mathrm{solving}\:\mathrm{approach} \\ $$$$\mathrm{find}\:\mathrm{the}\:\mathrm{following}: \\ $$$$\mathrm{a}.\:\mathrm{acceleration}\:\mathrm{of}\:\mathrm{the}\:\mathrm{system} \\ $$$$\mathrm{b}\:\mathrm{i}.\:\mathrm{velocity}\:\mathrm{with}\:\mathrm{which}\:\mathrm{the}\:\mathrm{4kg}\:\mathrm{mass}\:\mathrm{hits} \\ $$$$\mathrm{the}\:\mathrm{ground}. \\ $$$$\mathrm{b}\:\mathrm{ii}.\:\mathrm{time}\:\mathrm{the}\:\mathrm{4kg}\:\mathrm{mass}\:\mathrm{takes}\:\mathrm{to}\:\mathrm{hit}\:\mathrm{the}\:\mathrm{ground} \\ $$

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